FloodZoneMap.org provides free, instant flood zone lookups for any address in the United States. We query FEMA's National Flood Hazard Layer (NFHL) in real time to deliver accurate flood zone data.
Our data sources:
Disclaimer: Flood zone data is provided for informational purposes only. For official flood zone determinations, insurance rating, or building permit purposes, consult your local floodplain administrator or order a Flood Zone Determination from a certified provider.
Contact & feedback: The site is run by Patrick White. If you spot something wrong, have data you'd like to see added, or just want to suggest an improvement, email [email protected]. Every message gets read.
A quick thank-you to Dr. Jeff Masters (meteorologist at Yale Climate Connections, co-founder of Weather Underground), who took the time to send detailed feedback shortly after launch — several of his suggestions shaped how the hurricane data, zone explainers, and date ranges are presented today. That kind of generous, close-reading feedback from a domain expert is exactly what makes a site like this better. If you're reading this from his Bluesky post: welcome, and don't be shy — the email above is real, and feedback in his spirit is always welcome.